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4 years ago

8

What are some physical changes that occur at school? at home ? in nature ?

2 answers:

ad-work [718]4 years ago

8 0

Tearing paper

Breaking your pencil

Chopping down a tree

Breaking Mom's favorite vase ... I did that one before :)

Those are some examples of physical changes happening around us

jekas [21]4 years ago

8 0

At school: Children learning and growing, time passing during the day, the vibrations of sound.
At Home: Dinner being made, a new baby coming home
In Nature: A tree falling down, flowers growing, a bird laying an egg

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Length of the year is equivalent to the time it takes for one

Black_prince [1.1K]

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3 years ago

Read 2 more answers

1. Name three branches of<br> science.

mote1985 [20]

Answer:

Biology

Physics

Chemistry

Explanation:

Biology (life like cells, human reproduction, etc.)

Physics (Studies forces, like gravity.)

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3 years ago

Calculate the rate of acceleration of a 2,000.-kilogram truck if a force of 4,200 N is used to make it start moving forward?

Llana [10]

Answer:

Acceleration, $a=2.1\ m/s^2$

Explanation:

Given that,

Mass of a truck, m = 2000 kg

Force used to move the truck, F = 4200 N

We need to find the acceleration of the truck. The force acting on the truck is given by the expression as follows :

F = ma

a is the acceleration of the truck

$a=\dfrac{F}{m}\\\\a=\dfrac{4200}{2000}\\\\a=2.1\ m/s^2$

So, the acceleration of the truck is $2.1\ m/s^2$ .

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3 years ago

A squirrel on a limb near the top of a tree loses its grip on a nut, so that the nut slips away horizontally at a speed of 1.5m/

tatiyna

Answer:

The height of the squirrel $h =113 \ m$

Explanation:

From the question we are told that

The horizontally speed is $v = 1.5 m/s$

The horizontal distance $d = 7.2 \ m$

Generally the the time taken is mathematically represented

$t = \frac{d}{v}$

=> $t = \frac{7.2}{1.5}$

=> $t = 4.8 \ s$

Generally from kinematic equation we have that

$h = ut + \frac{1}{2} gt^2$

Here u is the initial velocity of nut in the vertical and the value is 0 m/s

$h = 0 * 4.8 + \frac{1}{2} * 9.8 * (4.8)^2$

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3 years ago

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Whitepunk [10]

The Ozone layer in the atmosphere absorbs the UV rays

Hope it helps!

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3 years ago